/Engine/Source/Runtime/NullDrv/Public/NullRHI.h
Copies the contents of one buffer to another buffer. They must have identical sizes.
virtual void RHICopyBuffer ( [FRHIBuffer](API\Runtime\RHI\FRHIBuffer) * SourceBuffer, [FRHIBuffer](API\Runtime\RHI\FRHIBuffer) * DestBuffer )